package com.enterprise.conn;

import javax.sql.*;
import java.sql.*;
import java.util.*;
import java.io.*;

public class JDBCUtils {
	private static DataSource  dataSource=null;

	static{                                                                                                                                                                                                           
		Properties properties=new Properties();
		InputStream in=JDBCUtils.class.getClassLoader().getResourceAsStream("dbcp.properties");
		try {
			properties.load(in);
		
			dataSource=org.apache.commons.dbcp2.BasicDataSourceFactory.createDataSource(properties);
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			System.out.println("数据库连接出错!");
			e.printStackTrace();
		}
	}
	public static Connection getConnection(){
		try {
			return dataSource.getConnection();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			
			e.printStackTrace();
			return null;
		}
	}
	public static void releaseConnection(Connection connection,Statement statement,ResultSet resultSet) {
		if (connection!=null) {
			try {
				connection.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if (statement!=null) {
			try {
				statement.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		if (resultSet!=null) {
			try {
				resultSet.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}
